search for: qausi

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2006 Sep 11
3
Extracting overdispersion estimates from lmer amd glm objects
Dear list, I am needing to extract the estimate of overdispersion (deviance / residual degrees of freedom or c-hat) from multiple model objects - so they can then be used to compare the extent of overdispersion among alternative models as well as calculate qausi-AIC values. I have been unable to do this, despite consulting a number of manuals and searching the R-help. I am imaging that in theory it should be possible with some call to attr(), but i have so far had no success. An example model output would be: > modeltest<-lmer(Coleodactylus_am...
2006 Jun 09
1
random generation for a quasi distribution
Un texte encapsul? et encod? dans un jeu de caract?res inconnu a ?t? nettoy?... Nom : non disponible Url : https://stat.ethz.ch/pipermail/r-help/attachments/20060609/ab46b028/attachment.pl